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随着煤炭事业的发展,对井巷支护方面的工作也有了蔓高的要求。锚固方法的发展趋势是:有较高的初锚力,增强巷道围岩的稳定性,缩短锚杆安装时间,简化操作工序,降低支护材料的成本。现在已出现了多种新型的锚杆,但有的初锚力低,峰值不高;有的虽有较大的锚固力,但成本较高,未取得较好的经济效益;而快硬膨胀水泥锚杆药卷则在上述几方面取得了较好
With the development of the coal industry, there has also been a high demand for the work on shaft support. The development trend of the anchoring method is to have a higher initial anchoring force, to enhance the stability of the surrounding rock of the roadway, to shorten the installation time of the anchor rod, to simplify the operation procedure and to reduce the cost of the supporting material. Now a variety of new bolt has emerged, but some of the initial anchor force is low, the peak is not high; although some have a larger anchoring force, but the cost is higher, did not get better economic benefits; and rapid hardening Cement bolt roll in the above several areas has made better